$12~15 is a standard fee for MMORPGs.
I played WoW for my full 30day trial afterwards, I could not bring myself to touch the game again. It's just too easy.
Everything comes to quickly, levels, weapons, money, craftings... It's all a joke.
Coming from were I did (FFXI) I expected to be challenged by WoW, I found nothing remotely challenging. It's all desings to give the players instant rewards and gratification. If you can enjoy that, then WoW just might be for you.